Judge Mark Horton sentenced him to two months in jail and said: “You took the most enormous and serious risk.

“You went out, you drank what must have been to oblivion and decided, on an angry whim, that catastrophic mixture – which is toxic – of drink and irrational anger and you have affected this man for the rest of his life.”

Caighli Taylor, prosecuting, told the jury James had been pulling faces at Mr Dixon in an attempt to provoke a fight.

She added: “Mr Dixon carried on dancing. He was facing the stage. Suddenly the defendant punched him hard once to the right side of his jaw.